Periodic table quiz

Question 1

Lavoiser

Answer 1

French (1700’s)
Completed this first list of known element (33)

Question 2

J.W. Dobereiner

Answer 2

German (1829)
Arranged the known elements into groups called triads

Question 3

John Newlands

Answer 3

English (1864)
Arranged by increasing atomic mass
Repeats every 8th element

Question 4

Mendeleev

Answer 4

(1869)
Increasing atomic mass. 63 known elements. grouped them in 8 columns. Left spaces for undiscovered elements. His table was used to make room for to predict unknown elements.

Question 5

Moseley

Answer 5

(1913)
Atomic numbers. When placed in atomic number with similar properties appear at regular intervals.

Question 6

Alkali group

Answer 6

Group 1 = 1Ve
Very reactive (especially water). Soft (cut with knife). SHiny but appears dull when exposed to air.

Question 7

Alkali Earth Metals

Answer 7

Group 2 = 2 Ve
Very reactive (not as reactive as Alkali metals). Harder, denser, stronger, higher melting points.

Question 8

Boron Family

Answer 8

Group 13 = 3 Ve
Scarce in nature(except aluminum). Metal properties (except boron - metalloid). Soft, low melting point. (except boron-hard, and hig melting)

Question 9

Carbon Family

Answer 9

Group 14 = 4 Ve
Includes nonmetals (carbon) and metals (silicon and germanium) and metals (Tin and Lead). Forms covalent compounds. Significant amount of Carbon in all living things.

Question 10

Nitrogen Family

Answer 10

Group 15 = 5 Ve
Nitrogen is most commonly found in atmosphere. Phosphorus and Nitrogen are found in living things (DNA). Solids at room temperature except Nitrogen.

Question 11

Oxygen Family

Answer 11

Group 16 = 6 Ve
Occurs elementally in nature and in combined states. [Slufur is used in fertilizers]

Question 12

Halogens

Answer 12

Group 17 = 7 Ve
REACTIVE (fluorine most reactive)
Forms salt

Question 13

Noble Gases

Answer 13

Group 18 = 8 Ve
Not reactive - full energy levels
All gases, nonmetlas, colorless and odorless

Question 14

Transition metals (D-block)

Answer 14

Good conductors
Group 3-12, Higher melting and boiling points, all metal properties

Question 15

Lanthanides (F-block)

Answer 15

Soft and too reactive to be used as materials. Shiny metals

Question 16

Actinides (F-block)

Answer 16

Radioactive, undergoes nuclear decay, unstable arrangement of protons and neutrons.

Question 17

Hydrogen

Answer 17

1 Ve
Like its own group, most common in the universe, and behavior based on its one electron